Lpc2000

----- Original Message ----- 
From: "Ian Wraith" <i.wraith@...>
To: <lpc2000@yahoogroups.com>
Sent: Tuesday, September 07, 2004 11:51 AM
Subject: [lpc2000] Interfacing a LPC2106 to a Dallas DS1990 iButton


> Hello
>       I am currently looking at using a LPC2106 in an access control
> unit to interface to a number of Dallas DS1990 iButtons. Am I correct
> in thinking that with a little code the iButtons could be interfaced
> to any of the LPC2106's GPIO pins ? Or would the iButton need to be
> interfaced to one the processors serial IO pins ?

The interface has to be 'bit-banged' in software so any I/O chip may be
used. Several people have done this sort of thing with PICs and AVRs, it
shouldn't be difficult to modify the code for the LPC2106.

Leon